Students Fix: Vb Net Lab Programs For Bca

Try conn.Open() Dim rowsAffected As Integer = cmd.ExecuteNonQuery() If rowsAffected > 0 Then MessageBox.Show("Record inserted successfully!", "Success") ' Clear form or reload data grid End If Catch ex As Exception MessageBox.Show("Error: " & ex.Message, "Database Error") Finally If conn.State = ConnectionState.Open Then conn.Close() cmd.Dispose() conn.Dispose() End Try End Sub

' Correct Procedure Sub Swap(ByRef x As Integer, ByRef y As Integer) Dim temp As Integer temp = x x = y y = temp End Sub ' Button Click Event Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Dim num1 As Integer = Val(TextBox1.Text) Dim num2 As Integer = Val(TextBox2.Text) Swap(num1, num2) ' Now this modifies the original variables TextBox1.Text = num1 TextBox2.Text = num2 End Sub vb net lab programs for bca students fix

VB.NET remains a staple in many BCA curricula because it teaches the fundamentals of , Event-Driven Programming , and Database Connectivity (ADO.NET) in a relatively forgiving environment. However, "forgiving" does not mean "error-proof." Try conn

Ensure you add the first two terms before the loop. Never put them inside. 2. Program: Swap Two Numbers (Using ByRef) Common Problem: The swap doesn't work; numbers remain unchanged after calling the function. 0 Then MessageBox.Show("Record inserted successfully!"

Imports System.Data.OleDb Private Sub btnInsert_Click(sender As Object, e As EventArgs) Handles btnInsert.Click ' Step 1: Connection string Dim connString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\BCA_Lab\CollegeDB.accdb" Dim conn As New OleDbConnection(connString)